Financial Instruments (Details) (USD $)	3 Months Ended	6 Months Ended
	Jul. 02, 2011	Jul. 02, 2011	Jan. 01, 2011
Assets
Cash equivalents - Money market funds	$ 532,346,000	$ 532,346,000	$ 463,681,000
Available-for-sale securities	3,240,000	3,240,000	12,702,000
Trading securities held in Non-Qualified Deferred Compensation Plan (NQDC)	27,063,000	27,063,000	28,738,000
2015 Notes Hedges	222,085,000	222,085,000	130,211,000
Foreign currency exchange contracts	490,000	490,000	1,559,000
Time Deposits	15,000	15,000	13,000
Total Assets	785,239,000	785,239,000	636,904,000
Liabilities
Acquisition-related contingent consideration	162,000	162,000	966,000
2015 Notes Embedded Conversion Derivative	222,085,000	222,085,000	130,211,000
Total Liabilities	222,247,000	222,247,000	131,177,000
Fair Value of Financial Instrument (Textuals) [Abstract]
Intangible assets in connection with business combinations	13,200,000	13,200,000
Lease loss accruals		1,500,000
Proceeds from the sale of available-for-sale securities	8,100,000	9,588,000
Transaction costs	400,000	400,000
Gains on sale of available-for-sale securities	8,000,000	8,000,000
Cost basis of Cadence's remaining marketable securities	1,900,000	1,900,000	3,200,000
Amount of convertible note held converted into non-marketable cost method equity securities	2,000,000
Gain on sale of interest in equity method investments		2,700,000
Carrying value of non-marketable securities	11,800,000	11,800,000	9,300,000
Fair Value Measurements, Level 1 [Member]
Assets
Cash equivalents - Money market funds	532,346,000	532,346,000	463,681,000
Available-for-sale securities	3,240,000	3,240,000	12,702,000
Trading securities held in Non-Qualified Deferred Compensation Plan (NQDC)	27,063,000	27,063,000	28,738,000
2015 Notes Hedges	0	0	0
Foreign currency exchange contracts	0	0	0
Time Deposits	15,000	15,000	13,000
Total Assets	562,664,000	562,664,000	505,134,000
Liabilities
Acquisition-related contingent consideration	0	0	0
2015 Notes Embedded Conversion Derivative	0	0	0
Total Liabilities	0	0	0
Fair Value Measurements, Level 2 [Member]
Assets
Cash equivalents - Money market funds	0	0	0
Available-for-sale securities	0	0	0
Trading securities held in Non-Qualified Deferred Compensation Plan (NQDC)	0	0	0
2015 Notes Hedges	222,085,000	222,085,000	130,211,000
Foreign currency exchange contracts	490,000	490,000	1,559,000
Time Deposits	0	0	0
Total Assets	222,575,000	222,575,000	131,770,000
Liabilities
Acquisition-related contingent consideration	0	0	0
2015 Notes Embedded Conversion Derivative	222,085,000	222,085,000	130,211,000
Total Liabilities	222,085,000	222,085,000	130,211,000
Fair Value Measurements, Level 3 [Member]
Assets
Cash equivalents - Money market funds	0	0	0
Available-for-sale securities	0	0	0
Trading securities held in Non-Qualified Deferred Compensation Plan (NQDC)	0	0	0
2015 Notes Hedges	0	0	0
Foreign currency exchange contracts	0	0	0
Time Deposits	0	0	0
Total Assets	0	0	0
Liabilities
Acquisition-related contingent consideration	162,000	162,000	966,000
2015 Notes Embedded Conversion Derivative	0	0	0
Total Liabilities	$ 162,000	$ 162,000	$ 966,000